STIEBEL ELTRON HPA-O 7 S Premium - Setting the Flow Rate on the Heating Side

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10.8 Setting the flow rate on the heating side
!
Material losses
For operation without a buffer cylinder, it is essential
that the electric emergency/booster heater (NHZ) is con-
nected.
The appliance is designed in such a way that no buffer cylinder
is required in conjunction with appropriately sized area heating
systems.
Installations with several heating circuits require a buffer cylinder
to be used.
The setting is made in heat pump mode. In order to do this, firstly
make the following settings:
 Temporarily remove the fuse from the electric emergency/
booster heater to isolate the emergency/booster heater from
the power supply. Alternatively, switch OFF the second heat
generator.
 Operate the appliance in heating mode.
In combination with the HM hydraulic module
Note
You can enable spread control in combination with the
HMhydraulic module (see menu “COMMISSIONING/
HEATING/ SPREAD CONTROL).
When spread control is disabled, the heat pump regulates
to the set pump rate and a fixed flow rate.
The flow rate is set automatically via the self-regulating system
(see menu "COMMISSIONING/ HEATING/ SPREAD CONTROL/
STANDBY PUMP RATE" in the heat pump manager).
In heat pump mode a fixed spread between the heat pump flow
and return is set (see menu "COMMISSIONING/ HEATING/ SPREAD
CONTROL" in the heat pump manager).
Checking the flow rate
 Set parameter STANDBY PUMP RATE to 100%.
 Set buffer operation to OFF.
 If no buffer cylinder is installed, close all controllable heating
circuits.
 The current flow rate can be called up in the menu "INFO/
INFO HEAT PUMP/ PROCESS DATA" under "WP WATER FLOW
RATE".
 Compare the value with the specification (see chapter "Speci-
fication/ Data table").
 If the specified flow rate is not met, take suitable measures
to achieve the flow rate.
 If no buffer cylinder is installed, reopen all controllable heat-
ing circuits.
 Reset the parameters to their original values.
10.8.1 Minimum flow rate with individual room control via
remote control in systems without buffer cylinder
For systems without a buffer cylinder, in the "SETTINGS/ HEAT-
ING/ STANDARD SETTING" menu, set the "BUFFER OPERATION"
parameter to "OFF".
In such cases, one or more heating circuits in the heating system
must be left open. Ensure the minimum flow rate (see "Specifica-
tion/ Data table") by means of the relevant open heating circuits
(see table "Sizing recommendation for the underfloor heating
system in the lead room").
Note
The table applies if individual room control is installed.
Sizing recommendation for the underfloor heating system in the
lead room:
!
Material losses
A buffer cylinder with diffusion-proof insulation is essen-
tial to enable cooling by means of fan convectors.
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HPA-O7SPremium 700 16 21 3x70 21 2x70
HPA-O7CSPremium 700 16 21 3x70 21 2x70
HPA-O10Premium 1000 29 28 4x70 32 3x70
HPA-O10CPremium 1000 29 28 4x70 32 3x70
HPA-O13Premium 1000 29 28 4x70 32 3x70
HPA-O13SPremium 1000 29 28 4x70 32 3x70
HPA-O13CPremium 1000 29 28 4x70 32 3x70
HPA-O13CSPremium 1000 29 28 4x70 32 3x70
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HPA-O7SPremium No 100 100 Yes
HPA-O7CSPremium No 100 100 Yes
HPA-O10Premium No 100 100 Yes
HPA-O10CPremium No 100 100 Yes
HPA-O13Premium No 100 100 Yes